Arsenal's SLR-106U/UR-60R is a semi-automatic pistol in 5.56x45 caliber featuring Arsenal's Picatinny quad rail handguard system (PR-03) and Sig Sauer's SB15 Pistol Stabilizing Brace on the receiver extension to improve single handed shooting. It has an 8.5" chrome-lined, hammer-forged barrel with a removable muzzle brake/compensator, short gas system, front sight block/gas block combination, and a stamped receiver. It has a reinforced black polymer pistol grip and the receiver extension has a waterproof storage compartment with a sealing, threaded cap. This pistol includes the US-made anti-slap double stage trigger group by Arsenal, Inc. for increased accuracy and predictability. It ships with one 5-round and one 20-round mil-spec Bulgarian Arsenal magazine, sling, cleaning rod, oil bottle, and cleaning kit.